Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 9 - Sequences and Series - 9-3 Geometric Sequences - Practice and Problem-Solving Exercises - Page 584: 11


Geometric with a common ratio of $0.4$.

Work Step by Step

Check if there is a common ratio by diving each pair of consecutive terms: $\dfrac{4}{10}$ $=0.4$; $\dfrac{1.6}{4}$ $=0.4$ ; $\dfrac{0.64}{1.6}$ $=0.4$. The ratio is constant so the sequence is geometric. The common ratio is $0.4$.
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